Compression resistance experiment equipment and method for touch screen

Abstract

The invention relates to the technical field of screen detection, and discloses a pressure resistance experiment device and method for a touch screen, the pressure resistance experiment device comprises a base and a mobile platform arranged on the base, the touch screen is adsorbed through the mobile platform, the touch screen is driven to move in pressure detection, and pressure is reasonably dispersed, a U-shaped support is arranged on the side face of the base, and the U-shaped support is connected with the mobile platform. The inner side of the U-shaped support is provided with a slidable extrusion support used for testing the pressure of the touch screen in the axial direction and the vertical direction, and the extrusion support is pushed by an electric cylinder installed on the U-shaped support. By means of the integrated design of the extrusion support, the pressure gauge A and the pressure gauge B are integrated, and when the electric cylinder pushes the hinged pressing head to press downwards, the pressure gauge A measures the vertical pressure to complete compression resistance detection; under pressure, the mobile platform drives the touch screen to move, friction force is transmitted to the pressure gauge B through the supporting frame, friction resistance detection is completed synchronously, equipment replacement or sample moving is not needed, efficiency is improved, and errors are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of screen detection, in particular to a kind of touch screen's compression test equipment and method. BACKGROUND

[0002] At present, touch screen has been deeply integrated into smart phone, tablet computer, vehicle-mounted central control and other electronic devices, and it frequently bears pressing, friction and other external force in daily use, and the compression resistance directly determines the durability and user experience of equipment, therefore, the compression detection and supporting experimental method for touch screen become the key link to guarantee product quality in electronic device production chain.

[0003] However, the equipment for touch screen detection in the current market still has many obvious limitations, which is difficult to meet the development needs of high quality and high efficiency of industry. First of all, the low functional integration is a prominent problem, most detection equipment can only realize single compression detection or friction resistance detection function, if you want to comprehensively evaluate the comprehensive performance of touch screen, the detection sample needs to be transferred between multiple devices with different functions. This process not only greatly increases the operation steps and reduces the overall detection efficiency, but also easily causes errors in the detection results due to the position deviation and environmental condition change in the sample transfer process, which cannot meet the dual requirements of detection accuracy and efficiency for industrialized mass production. Therefore, the present application provides a kind of touch screen's compression test equipment and method. SUMMARY

[0004] In view of the above shortcomings of the prior art, the present application provides a kind of touch screen's compression test equipment and method, which integrates compression detection and friction resistance detection functions, and is convenient for detection.

[0005] The present application provides the following technical scheme: a kind of touch screen's compression test equipment, including base and the mobile platform of setting on base, touch screen is adsorbed by mobile platform and is moved in pressure detection and drives touch screen, and the pressure is dispersed reasonably, the side of the base is equipped with U-shaped support, the inner side of the U-shaped support is equipped with the extrusion support for axial and vertical experimental touch screen pressure that can slide, and extrusion support is pushed by electric cylinder installed on U-shaped support, downward pressure is applied to touch screen by extrusion support, while mobile platform drives touch screen to move, so that touch screen receives axial friction, detects touch screen screen compression and friction resistance test.

[0006] Preferably, the moving platform comprises two grooves opened on the base, and X-axis modules are installed in the two grooves, telescopic mechanisms are installed on the sliding tables of the two X-axis modules and can be telescoped up and down, the two X-axis modules are connected with the bottom of the moving frame through the telescopic mechanisms, a Y-axis module is installed on the top of the moving frame, the sliding table of the Y-axis module is also connected with the vacuum adsorption platform through a telescopic mechanism, and the bottom of the vacuum adsorption platform is connected with two supporting sliding seats, and the two supporting sliding seats slide on the base.

[0007] Preferably, the moving frame is installed between the two supporting sliding seats, the Y-axis module does not contact the two supporting sliding seats, the Y-axis module drives the vacuum adsorption platform to translate, and the two supporting sliding seats contact the base, so that the vacuum adsorption platform is stably supported.

[0008] Preferably, the bottom of the supporting sliding seat is inlaid with a plurality of groups of universal ball bearings arranged in a rectangular array, and the supporting sliding seat slides on the bottom of the base through the universal ball bearings.

[0009] Preferably, the extrusion support comprises a U-shaped frame sliding on both sides of the U-shaped support, an A pressure device is installed at the bottom of the electric cylinder mounting point, a locking sleeve is installed at the bottom of the A pressure device, a hinge pressing head that can rotate left and right is inserted into the locking sleeve, two hinge joints that are symmetrically arranged are arranged on the side surface of the hinge pressing head, the two hinge joints are connected with B pressure devices on both sides of the U-shaped frame through supporting frames, the pressure that the hinge pressing head exerts on the touch screen is detected through the A pressure device, and the friction of the touch screen is detected through the two B pressure devices.

[0010] Preferably, the hinge pressing head is composed of two parts, the two parts are hinged through a connecting shaft, the two hinge joints are the same in structure, and the design of the hinge pressing head and the hinge joint can avoid deformation caused by external force, so as to protect the accuracy of the readings of the A pressure device and the B pressure device.

[0011] Preferably, the hinge joint rotates up and down, the two supporting frames support the lower part of the hinge pressing head, so that the upper and lower parts of the hinge pressing head remain vertical, when the friction is detected, the touch screen is subjected to friction in the direction of the supporting frame, the lower part of the hinge pressing head rotates in the direction of the supporting frame under the force, so that the supporting frame is subjected to pressure and feeds back to the B pressure device, and the friction of the touch screen is detected through the B pressure device.

[0012] Preferably, the locking sleeve comprises a sleeve and an annular groove opened in the sleeve, the annular groove is sealed by a soft metal sleeve to form a sealed space, the outer side of the sleeve is provided with a pressurizing port communicated with the annular groove, the inside of the pressurizing port is provided with a slidable piston, the side of the piston is led out from the pressurizing port port by a threaded rod, and the inside of the annular groove is injected with oil, the oil in the annular groove is pressurized by rotating the threaded rod to move the piston in the pressurizing port, and the soft metal sleeve is deformed to lock the articulated pressure head under the impact of the oil under pressure.

[0013] Preferably, the support frame comprises a support column mounted on the B pressure device, and the front end of the support column is provided with an internal threaded groove, the front end of the support column is threadedly connected with the rear end of the adjusting column, and the front end of the adjusting column is threadedly connected with the articulated joint, and the articulated joint can be assembled by rotating the adjusting column.

[0014] A pressure resistance test method of a touch screen, the specific operation is as follows: the touch screen is adsorbed by a moving platform, and the moving platform is controlled to drive the touch screen to move, so that the touch screen detection point moves to a specified position, the extrusion support is driven downward by the electric cylinder, the downward pressure of the extrusion support on the touch screen is detected, and the moving platform is controlled to displace, so that the touch screen is subjected to friction resistance test under the pressure of the extrusion support.

[0015] Compared with the prior art, the present application has the following beneficial effects:

[0016] (1) Breaking the single detection limitation of traditional equipment, integrating A and B pressure devices by means of the integrated design of the extrusion support, when the articulated pressure head is pressed down by the electric cylinder, the vertical pressure is measured by the A pressure device to complete the pressure resistance test; when the pressure is maintained, the moving platform drives the touch screen to move, the friction force is transmitted to the B pressure device through the support frame, and the friction resistance test is completed synchronously, without the need to change equipment or move the sample, so that the efficiency is improved and the error is reduced.

[0017] (2) In view of the problem that the X and Y axis modules are easily affected by pressure, the telescopic mechanism cooperates with the support sliding seat to isolate the influence of pressure on the module when the telescopic mechanism is shortened during detection, the vacuum adsorption platform transmits pressure to the base through the support sliding seat, the universal ball bearings at the bottom of the support sliding seat ensure smooth movement and reduce wear, the material and structural design of the articulated pressure head avoid deformation, and the reading accuracy of the pressure device is ensured, so that the data reliability is improved.

[0018] (3) The articulated pressure head adopts upper and lower articulated design, and only the lower part rotates when affected by friction, without affecting the reading of the A pressure device; the high-strength alloy material prevents deformation, and cooperates with the support of the articulated joint and the support frame to ensure the reading accuracy of the A and B pressure devices and improve the reliability of the detection data. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1The schematic diagram of the overall structure of the present application;

[0020] Figure 2 The schematic diagram of the mobile platform structure of the present application;

[0021] Figure 3 The schematic diagram of the universal ball structure of the present application;

[0022] Figure 4 The schematic diagram of the extrusion support structure of the present application;

[0023] Figure 5 The schematic diagram of the hinged pressure head and hinged head structure of the present application;

[0024] Figure 6 The schematic diagram of the locking sleeve structure of the present application;

[0025] Figure 7 The schematic diagram of the support frame structure of the present application.

[0026] In the figure: 1, base; 2, mobile platform; 3, U-shaped support; 4, extrusion support; 5, electric cylinder; 21, groove; 22, X-axis module; 23, telescopic mechanism; 24, mobile frame; 25, Y-axis module; 26, vacuum adsorption platform; 27, support sliding seat; 28, universal ball; 41, U-shaped frame; 42, A pressure device; 43, locking sleeve; 44, hinged pressure head; 45, hinged head; 46, support frame; 47, B pressure device; 431, sleeve; 432, annular groove; 433, soft metal sleeve; 434, pressurizing port; 435, piston; 436, threaded rod; 461, support column; 462, adjusting column. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the present disclosure clearer, the technical scheme of the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings of the embodiments of the present disclosure. In order to keep the following description of the embodiments of the present disclosure clear and concise, the present disclosure omits the detailed description of known functions and known components to avoid unnecessary confusion of the concept of the present application.

[0028] Please refer to Figure 1The touch screen compression experiment equipment comprises five parts, i.e., a base 1, a moving platform 2, a U-shaped support 3, an extrusion support 4 and an electric cylinder 5. The base 1 is used as a basic bearing structure of the equipment and provides a stable installation reference for all components. The moving platform 2 is installed on the top of the base 1 and is used for realizing adsorption and fixation and multidirectional movement of the touch screen. The U-shaped support 3 is vertically fixed on the side of the base 1, and an inner side of the U-shaped support 3 is reserved with a track for sliding of the extrusion support 4. The extrusion support 4 is movable in the vertical direction in the U-shaped support 3 through the track. The electric cylinder 5 is installed on the top of the U-shaped support 3, and an output end of the electric cylinder 5 is connected with the extrusion support 4, so as to provide power for vertical movement of the extrusion support 4. The moving platform 2 drives the touch screen to move horizontally, and finally realizes double detection of compression resistance and friction resistance of the touch screen.

[0029] Referring to Figure 2 The moving platform 2 comprises two grooves 21, two X-axis modules 22, two sets of telescopic mechanisms 23, a moving frame 24, a Y-axis module 25, a vacuum adsorption platform 26 and two support sliding seats 27. The two grooves 21 are parallelly arranged on the top surface of the base 1 and extend along the length direction of the base 1. The two X-axis modules 22 are respectively embedded and fixed in the two grooves 21, and a sliding table of the X-axis module 22 is movable along the length direction of the groove 21. The two sets of telescopic mechanisms 23 are respectively vertically installed on the top of the sliding table of the two X-axis modules 22. An output end of the telescopic mechanism 23 is fixedly connected with the bottom of the moving frame 24. Through the free telescopic action of the telescopic mechanism 23, the pressure can be avoided from being transmitted to the X-axis module 22 by the moving frame 24, so as to affect the operation of the X-axis module 22. Through the telescopic mechanism 23, the moving frame 24 and the X-axis module 22 can be kept movable up and down. When the moving frame 24 is subjected to pressure and slightly deformed downward, the X-axis module 22 can be avoided from being extruded by the telescopic mechanism 23, so that the X-axis module 22 can be operated under no pressure.

[0030] The moving frame 24 is in a rectangular frame structure. The Y-axis module 25 is fixedly installed on the top center position of the moving frame 24, and the extension direction of the Y-axis module 25 is perpendicular to the X-axis module 22. A set of telescopic mechanisms 23 is also installed on the top of the sliding table of the Y-axis module 25. An output end of the telescopic mechanism 23 is connected with the bottom center of the vacuum adsorption platform 26. Through the telescopic mechanism 23, the pressure can be avoided from being transmitted to the Y-axis module 25 by the vacuum adsorption platform 26, so that the Y-axis module 25 can be operated under no pressure. The bottom sides of the vacuum adsorption platform 26 are respectively fixedly connected with the top of the two support sliding seats 27. The bottom of the support sliding seat 27 is in contact with the top surface of the base 1 and is slidable along the surface of the base 1.

[0031] The telescopic mechanism 23 on the slide table of the X-axis module 22 and the Y-axis module 25, when the device is in the detection state, the vacuum adsorption platform 26 is pressed downward by the extrusion support 4, the extrusion support 4 will be slightly deformed downward, and the two supporting sliding seats 27 serve as a supporting structure to share the pressure to the base 1, and the extrusion support 4 will extrude the contacted object during the deformation process, so that the slide table of the X-axis module 22 and the Y-axis module 25 cannot be directly installed, and the telescopic mechanism 23 is used to make the slide table of the X-axis module 22 and the moving frame 24 have a spacing, and the slide table of the Y-axis module 25 and the vacuum adsorption platform 26 keep a spacing, so that the moving frame 24 and the vacuum adsorption platform 26 will not be extruded when they are pressed downward, thereby protecting the movement accuracy of the X-axis module 22 and the Y-axis module 25 from being affected by the pressure.

[0032] Referring to Figure 3 The bottom of the supporting sliding seat 27 is inlaid with a plurality of groups of universal ball bearings 28 arranged in a rectangular array, and the bottom of the universal ball bearings 28 is in contact with the top surface of the base 1. When the moving frame 24 is moved along the X-axis direction by the X-axis module 22, or the vacuum adsorption platform 26 is moved along the Y-axis direction by the Y-axis module 25, the supporting sliding seat 27 rolls on the surface of the base 1 through the universal ball bearings 28, greatly reducing the sliding friction, and ensuring the stability and accuracy of the moving platform 2 when moving the touch screen. Since the supporting sliding seat 27 is a supporting component between the vacuum adsorption platform 26 and the base 1, a plurality of universal ball bearings 28 are needed to share the stress.

[0033] The top surface of the vacuum adsorption platform 26 is provided with a plurality of vacuum adsorption holes, and the vacuum adsorption holes are connected with the external vacuum pump through the internal air duct. When it is necessary to fix the touch screen, the touch screen is placed on the top of the vacuum adsorption platform 26, and the vacuum pump is started to form negative pressure in the adsorption holes, so that the touch screen is tightly adsorbed on the vacuum adsorption platform 26, preventing displacement of the touch screen during the detection process.

[0034] Referring to Figure 4 and Figure 5 The extrusion support 4 includes a U-shaped frame 41, an A pressure device 42, a locking sleeve 43, a hinged pressure head 44, two hinge joints 45, two support frames 46, and two B pressure devices 47. The two side edges of the U-shaped frame 41 are respectively embedded in the tracks on the inner sides of the U-shaped supports 3, and can be vertically slid along the tracks; the output end of the electric cylinder 5 is connected with the top center of the U-shaped frame 41, and the U-shaped frame 41 is moved up and down along the tracks by the extension and contraction of the electric cylinder 5.

[0035] A pressure device 42 is vertically installed on the inside top of the U-shaped frame 41 and is located directly below the output end of the electric cylinder 5; a locking sleeve 43 is fixedly installed on the bottom of the A pressure device 42, the top of the articulated pressure head 44 is inserted into the inside of the locking sleeve 43, and the articulated pressure head 44 and the A pressure device 42 are detachably fixed through the locking sleeve 43; two articulated joints 45 are symmetrically arranged on the two sides of the side surface of the articulated pressure head 44; two B pressure devices 47 are respectively horizontally installed on the left and right two side walls of the inside of the U-shaped frame 41, one end of two support frames 46 is respectively connected with the output end of the two B pressure devices 47, and the other end is respectively articulated with the two articulated joints 45, forming lateral support for the articulated pressure head 44.

[0036] The articulated pressure head 44 is composed of an upper part and a lower part, the top of the upper part is inserted into the locking sleeve 43, and the lower part is used to contact the touch screen, the upper part and the lower part are articulated through a horizontally arranged connecting shaft, so that the lower part can rotate around the connecting shaft in the direction of the support frame 46; the two articulated joints 45 are respectively fixed on the left and right sides of the lower part of the articulated pressure head 44, and the two articulated joints 45 are completely the same in structure, the articulated joint 45 is rotatable along the vertical direction of the articulated pressure head 44, such as Figure 5 The rotation direction of the articulated joint 45 can be known.

[0037] The two support frames 46 symmetrically support the lower part of the articulated pressure head 44, so that the upper part and the lower part of the articulated pressure head 44 are kept on the same vertical line, ensuring the accuracy of the initial pressure application during detection; at the same time, the upper part, the lower part of the articulated pressure head 44 and the articulated joint 45 are all made of high-strength alloy material, and the structural design meets the anti-deformation requirement, which can avoid deformation due to stress during detection, thereby ensuring the accuracy of the readings of the A pressure device 42 and the B pressure device 47.

[0038] In the friction detection, the articulated pressure head 44 is bent when the friction force is large, but it remains vertical when the friction force is small. The friction force is generated by the movement of the platform 2 and the touch screen along the support frame 46, which causes the articulated pressure head 44 to be slightly offset in the direction of the support frame 46. The downward pressure and the axial friction force cause the articulated pressure head 44 to rotate slightly, which affects the readings of the A pressure gauge 42 and the B pressure gauge 47. However, the design of the articulated pressure head 44 allows it to rotate slightly in the direction of the support frame 46, which maintains the readings of the A pressure gauge 42 unchanged. The two articulated joints 45 are designed to rotate in the direction of the support frame 46, which prevents the articulated pressure head 44 from rotating. However, when the friction force is large, the lower part of the articulated pressure head 44 rotates slightly (the offset angle is between 0-1 degrees, almost invisible), and the two articulated joints 45 support the articulated pressure head 44, one articulated joint 45 rotates slightly upward and is pushed by the articulated pressure head 44, and the other articulated joint 45 rotates slightly downward and is pulled by the articulated pressure head 44. These rotation angles are almost invisible, and the support frame 46 connects the articulated joints 45 to prevent the articulated pressure head 44 from rotating excessively. The articulated joints 45 are connected to the B pressure gauge 47 through the support frame 46, which makes the data detected by the B pressure gauge 47 more accurate and provides support. When the lower part of the articulated pressure head 44 rotates due to the friction force, it is transmitted to the support frame 46 through the articulated joints 45, and the value is obtained through the B pressure gauge 47.

[0039] Another solution is to use a threaded pipe for the articulated joint 45, which is connected to the support frame 46 to provide support to the lower part of the articulated pressure head 44 in two directions, preventing it from rotating excessively. However, when the articulated pressure head 44 is subjected to friction, the lower part of the articulated joint 45 rotates slightly, causing one articulated joint 45 to be pulled and the other articulated joint 45 to be squeezed,

[0040] Referring to Figure 6 The locking sleeve 43 is composed of a sleeve 431, an annular groove 432, a soft metal sleeve 433, a pressurizing port 434, a piston 435, and a threaded rod 436. The sleeve 431 is a hollow cylindrical structure, and its top is fixedly connected to the bottom of the A pressure gauge 42. The annular groove 432 is opened in the middle of the inner wall of the sleeve 431 and surrounds the axis of the sleeve 431 in a ring shape. The soft metal sleeve 433 is made of copper or aluminum, which is easy to deform, and its outer side is tightly fitted with the inner wall of the annular groove 432, and its inner side forms a channel for the articulated pressure head 44 to insert. The two ends of the soft metal sleeve 433 are sealingly connected to the inner wall of the sleeve 431, forming a sealed space between the annular groove 432 and the soft metal sleeve 433.

[0041] The pressurizing port 434 is horizontally arranged on the side wall of the sleeve 431 and communicates with the annular groove 432; the piston 435 is slidingly arranged inside the pressurizing port 434, and the outer side wall of the piston 435 is in sealing fit with the inner wall of the pressurizing port 434; one end of the threaded rod 436 is fixedly connected with the side center of the piston 435, and the other end extends outside the sleeve 431 through the internal thread of the port of the pressurizing port 434. The oil liquid is pre-injected into the sealed space of the annular groove 432, when the articulated pressure head 44 is inserted into the inside passage of the soft metal sleeve 433, the threaded rod 436 is rotated to push the piston 435 to move towards the annular groove 432, so as to apply pressure to the oil liquid in the sealed space; the oil liquid is extruded to the soft metal sleeve 433 under the action of the pressure, so that the soft metal sleeve 433 is deformed and tightly wraps the outer wall of the articulated pressure head 44, thereby realizing the locking and fixing of the articulated pressure head 44; the threaded rod 436 is reversely rotated, the oil liquid pressure is released, and the soft metal sleeve 433 returns to the original state, so that the articulated pressure head 44 can be taken out of the locking sleeve 43, facilitating the replacement and maintenance of the articulated pressure head 44.

[0042] When the upper part of the articulated pressure head 44 is inserted into the locking sleeve 43, the locking sleeve 43 locks the articulated pressure head 44, avoiding the shaking of the articulated pressure head 44 in the extrusion process, and affecting the measured value.

[0043] Referring to Figure 7 The support frame 46 comprises a support column 461 and an adjusting column 462. One end of the support column 461 is fixedly connected with the output end of the B pressure device 47, and the other end of the support column 461 is provided with an internal thread groove; the outer side of one end of the adjusting column 462 is provided with an external thread, which is threadedly connected with the internal thread groove of the support column 461, and the other end of the adjusting column 462 is provided with a thread matched with the thread groove of the end head of the articulated joint 45, and the adjusting column 462 is articulated with the articulated joint 45 by rotating.

[0044] During the equipment assembly process, the overall length of the support frame 46 can be adjusted by rotating the adjusting column 462, so as to ensure that the support force of the two support frames 46 on the articulated pressure head 44 is uniform; when detecting the friction force, the touch screen and the lower part of the articulated pressure head 44 generate a friction force when the mobile platform 2 drives the touch screen to move in the horizontal direction, the lower part of the articulated pressure head 44 rotates in the stress direction under the action of the friction force, and then pushes the adjusting column 462 on the side to move towards the support column 461, and the support column 461 transmits the pressure to the B pressure device 47, and the B pressure device 47 can calculate the friction force suffered by the touch screen by detecting the pressure value.

[0045] The touch screen pressure resistance experiment method described in the embodiment adopts the touch screen pressure resistance experiment device in the above embodiment, and the specific operation steps are as follows:

[0046] Fixing the touch screen

[0047] Place the touch screen to be tested on the top of the vacuum adsorption platform 26, ensuring that the detection surface of the touch screen faces upwards; start the vacuum pump to form negative pressure through the adsorption holes of the vacuum adsorption platform 26, tightly adsorbing the touch screen on the vacuum adsorption platform 26, and close the air inlet valve of the vacuum pump to maintain the adsorption state.

[0048] Detection position adjustment

[0049] Control the telescopic mechanism 23 to shorten, so that the vacuum adsorption platform 26 is in close contact with the surface of the base 1 through the support sliding seat 27. At this time, the telescopic mechanism 23 is in a non-stressed state.

[0050] According to the detection requirements of the touch screen, such as detecting the center position, corner position, etc. of the touch screen, send instructions to the X-axis module 22 and Y-axis module 25 through the control system: the X-axis module 22 drives the moving frame 24 to move along the X-axis direction, and the Y-axis module 25 drives the vacuum adsorption platform 26 to move along the Y-axis direction, finally moving the target detection point of the touch screen to the directly below the hinged pressure head 44 in the extrusion bracket 4.

[0051] Compression resistance performance detection

[0052] Start the electric cylinder 5, control the output end of the electric cylinder 5 to slowly extend downward, drive the extrusion bracket 4 to vertically move downward along the track of the U-shaped bracket 3, until the lower part of the hinged pressure head 44 contacts the target detection point of the touch screen.

[0053] Continue to control the electric cylinder 5 to slowly move downward, so that the hinged pressure head 44 applies downward pressure to the touch screen, and the A pressure gauge 42 detects and records the reaction force of the hinged pressure head 44 in real time, i.e. the pressure borne by the touch screen, until the pressure value reaches the preset detection pressure threshold, or the touch screen appears failure phenomena such as damage, deformation, etc.

[0054] If the touch screen does not fail after the pressure reaches the threshold value, maintain the pressure value for a certain period of time, such as 30 seconds, observe whether the touch screen appears delayed failure phenomenon, and record the stable reading of the A pressure gauge 42; if the touch screen fails during the pressure application process, record the pressure value of the A pressure gauge 42 at the moment of failure as the compression limit value of the touch screen.

[0055] Friction resistance performance detection

[0056] When completing the compression resistance performance detection or separately performing the friction resistance detection, maintain the output state of the electric cylinder 5, so that the reading of the A pressure gauge 42 is stable at the preset friction detection pressure value, which is usually less than the compression limit value of the touch screen, to ensure that the hinged pressure head 44 and the touch screen maintain stable contact pressure.

[0057] According to the detection requirement, the friction detection is carried out along the X-axis or Y-axis direction: if the detection is carried out along the X-axis direction, the X-axis module 22 drives the moving frame 24 and the vacuum adsorption platform 26 to move along the Y-axis direction, that is, the installation direction of the support frame 46 at a preset speed.

[0058] During the movement of the touch screen, the friction force is generated between the touch screen and the articulated pressure head 44, the lower part of the articulated pressure head 44 rotates to the side of the moving direction under the action of the friction force, pushes the support frame 46 on the side, and the pressure is transmitted to the corresponding B pressure gauge 47, the B pressure gauge 47 detects and records the pressure value in real time, the pressure value is in linear correspondence with the friction force, and the friction force suffered by the touch screen can be obtained through a preset conversion formula.

[0059] After the moving platform 2 drives the touch screen to complete the movement of the preset distance, the movement is stopped, and the maximum reading, the minimum reading and the average reading of the B pressure gauge 47 are recorded as the evaluation basis of the anti-friction performance of the touch screen; if the anti-friction performance under different pressures needs to be detected, the output pressure of the electric cylinder 5 can be adjusted, and the above steps are repeated for multiple detections.

[0060] Detection end and device reset

[0061] After the detection is completed, the output end of the electric cylinder 5 is controlled to retract upward, driving the extrusion support 4 to return to the initial position; at the same time, the X-axis module 22 and the Y-axis module 25 drive the vacuum adsorption platform 26 to return to the material taking position.

[0062] The inlet valve of the vacuum pump is opened, the negative pressure in the vacuum adsorption platform 26 is released, the detected touch screen is taken down, the appearance state of the touch screen is observed, such as whether there is scratch, damage and the like, and the detection report is completed in combination with the recorded data of the A pressure gauge 42 and the B pressure gauge 47.

[0063] The telescopic mechanism 23 is controlled to be elongated, so that the support sliding seat 27 is separated from the surface of the base 1, the power of the device is turned off, and the device reset is completed.

[0064] The above examples are only exemplary embodiments of the present application and are not used to limit the present application, the protection scope of the present application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the present application within the spirit and protection scope of the present application, and such modifications or equivalent replacements are also regarded as falling within the protection scope of the present application.

Claims

1. A compression test apparatus for a touch screen, characterized by: The utility model provides a kind of experimental device for testing the screen pressure and friction of touch screen, including base (1) and the mobile platform (2) being arranged on base (1), touch screen is adsorbed and is moved in pressure detection by mobile platform (2) to touch screen, and pressure is dispersed reasonably, the side of base (1) is equipped with U type support (3), the inside of U type support (3) is equipped with the extrusion support (4) for axial and vertical direction experimental touch screen pressure slidably, and extrusion support (4) is pushed by electric cylinder (5) installed on U type support (3), downward pressure is applied to touch screen by extrusion support (4), while mobile platform (2) drives touch screen to move, so that touch screen is subjected to axial friction, and the screen pressure and friction of touch screen are detected.

2. The pressure test apparatus for a touch screen according to claim 1, wherein: The mobile platform (2) includes two grooves (21) opened on the base (1), and X-axis module (22) is installed in the two grooves (21), the telescopic mechanism (23) is installed on the slide table of the two X-axis modules (22), the telescopic mechanism (23) is connected with the bottom of the moving frame (24), the Y-axis module (25) is installed on the top of the moving frame (24), the slide table of the Y-axis module (25) is connected with the vacuum adsorption platform (26) through the telescopic mechanism (23), and the bottom of the vacuum adsorption platform (26) is connected with the base (1) through the two supporting sliding seats (27).

3. The pressure test apparatus for a touch screen according to claim 2, wherein: The moving frame (24) is installed between the two supporting sliding seats (27), the Y-axis module (25) is not in contact with the two supporting sliding seats (27), the Y-axis module (25) drives the vacuum adsorption platform (26) to move, and the vacuum adsorption platform (26) is stably supported through the contact between the two supporting sliding seats (27) and the base (1).

4. The pressure test apparatus for a touch screen according to claim 2, wherein: The bottom of the supporting sliding seat (27) is embedded with a plurality of groups of universal ball bearings (28) arranged in a rectangular array, and the supporting sliding seat (27) slides on the bottom of the base (1) through the universal ball bearings (28).

5. The pressure test apparatus for a touch screen according to claim 1, wherein: The extrusion support (4) includes a U-shaped frame (41) sliding on both sides inside the U-shaped support (3), an A pressure device (42) is installed at the bottom of the U-shaped frame (41) at the electric cylinder (5) mounting point, a locking sleeve (43) is installed at the bottom of the A pressure device (42), a hinge pressure head (44) that can rotate left and right is inserted into the locking sleeve (43), two hinge joints (45) symmetrically arranged on the side of the hinge pressure head (44), two B pressure devices (47) on both sides inside the U-shaped frame (41) are connected through a support frame (46) and the two hinge joints (45), the pressure of the touch screen under the hinge pressure head (44) is detected by the A pressure device (42), and the friction of the touch screen is detected by the two B pressure devices (47).

6. The pressure test apparatus for a touch screen according to claim 5, wherein: The hinge pressure head (44) is composed of two parts, the two parts are connected through a connecting shaft, the two hinge joints (45) are the same structure, and the design of the hinge pressure head (44) and the hinge joint (45) can avoid deformation under external force, and the accuracy of the readings of the A pressure device (42) and the B pressure device (47) is protected.

7. The pressure test apparatus for a touch screen according to claim 6, wherein: The articulated head (45) is in a state of rotation up and down, and the two support frames (46) support the lower part of the articulated pressure head (44), so that the upper and lower parts of the articulated pressure head (44) remain vertical. When detecting the friction force, the touch screen is subjected to the friction force in the direction of the support frame (46), and the lower part of the articulated pressure head (44) is subjected to the force and rotates in the direction of the support frame (46), so that the support frame (46) is subjected to the pressure and is fed back to the B pressure device (47), and the friction force of the touch screen is detected through the B pressure device (47).

8. The pressure test apparatus for a touch screen according to claim 5, wherein: The locking sleeve (43) comprises a sleeve (431) and an annular groove (432) formed in the sleeve (431), the annular groove (432) is sealed by a soft metal sleeve (433) to form a sealed space, the outer side of the sleeve (431) is provided with a pressurizing port (434) communicated with the annular groove (432), the inside of the pressurizing port (434) is provided with a slidable piston (435), the side of the piston (435) is led out from the port of the pressurizing port (434) through a threaded rod (436), and the inside of the annular groove (432) is injected with oil. By rotating the threaded rod (436), the piston (435) moves in the pressurizing port (434), the oil in the annular groove (432) is pressurized, and the oil under pressure impacts the soft metal sleeve (433), so that the soft metal sleeve (433) is deformed to lock the articulated pressure head (44).

9. The pressure test apparatus for a touch screen according to claim 5, wherein: The support frame (46) comprises a support column (461) mounted on the B pressure device (47), and the front end of the support column (461) is provided with an internal thread groove, the front end of the support column (461) is threadedly connected with the rear end of an adjusting column (462), and the front end of the adjusting column (462) is threadedly connected with the articulated head (45). By rotating the adjusting column (462) connected with the articulated head (45), the articulated head (45) is conveniently assembled.

10. A method of pressure test of a touch screen, characterized by, The anti-pressure test equipment for a touch screen according to any one of claims 1-9 is used, and the specific operation is as follows: the touch screen is adsorbed by the moving platform (2), and the moving platform (2) is controlled to drive the touch screen to move, so that the touch screen detection point moves to a specified position. The electric cylinder (5) pushes the extrusion support (4) to move downward, so that the extrusion support (4) applies downward pressure to the touch screen, and the detector detects the pressure. The moving platform (2) is controlled to displace, so that the touch screen is subjected to the anti-friction test under the pressure applied by the extrusion support (4).

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